diff --git a/appl/kx/rxtelnet.1 b/appl/kx/rxtelnet.1
index 3b4238b33..0c0899b4f 100644
--- a/appl/kx/rxtelnet.1
+++ b/appl/kx/rxtelnet.1
@@ -13,6 +13,7 @@ start a telnet and forward X-connections.
 .Op Fl k
 .Op Fl t Ar telnet_args
 .Op Fl x Ar xterm_args
+.Op Fl K Ar kx_args
 .Op Fl w Ar term_emulator
 .Op Fl b Ar telnet_program
 .Op Fl n
@@ -48,6 +49,11 @@ Send
 .Ar xterm_args
 as arguments to
 .Nm xterm
+.It Fl X
+Send
+.Ar kx_args
+as arguments to
+.Nm kx
 .It Fl w
 Use
 .Ar term_emulator